1The 20-MB Flash disk is no longer available; the 32-MB Flash disk is now the default Flash configuration.

Note In most NRP-2 configurations, 256-MB DRAM is adequate for up to 6500 sessions. If you have more sessions, the requirement is 512-MB DRAM.

Note When you are running multicast in an NRP-2 configuration, the NRP-2 should have 512 MB of memory.

Note In most NRP-1 configurations, 64-MB DRAM is adequate for up to 750 sessions. If you have more sessions, you need 128-MB DRAM. If you are using the NRP-1, for an upgrade from an earlier release to Cisco IOS Release 12.2(2)B7, 128-MB DRAM is recommended.

Supported Hardware

Cisco IOS Release 12.2(2)B7 supports the Cisco 6400 NRP-1, NRP-2, NRP-2SV, NSP, and NSP-S3B modules. The NSP-S3B, otherwise identical to the NSP, is required if you want to use the Building Integrated Timing Supply (BITS) Network Clocking software feature.

Feature Set Tables

The Cisco IOS software is packaged in software images. Each image contains a set of Cisco IOS features.

Table 2 lists the features supported by the Cisco 6400 NRP images in this release. Table 3 lists the features supported by the Cisco 6400 NSP images in this release. These tables also include features supported by earlier releases.

Note Table 2 might not be cumulative or list all of the features in each image. For a list of the T-train features in this platform, refer to Feature Navigator. For more information about Feature Navigator, see the "Feature Navigator" section.

The Cisco IOS software is packaged in software images. Each image contains a specific set of Cisco IOS features. Table 3 lists the features supported by the Cisco 6400 NSP image called c6400s-wp-mz in Cisco IOS Release 12.2(2)B7. The table indicates the release in which each feature was originally introduced. All features supported in previous releases are included in Release 12.2(2)B7.

Note Table 3 might not be cumulative or list all of the features in each image. For a list of the T-train features in this platform, refer to Feature Navigator. For more information about Feature Navigator, see the "Feature Navigator" section.

•When you flap an ATM subinterface that has traffic shaping enabled, the NRP-2SV SAR can fail. If this occurs, all sessions will eventually timeout and disconnect. This issue can also occur when you change vc-class parameters. If you use traffic shaping and you need to change configurations related to virtual circuits with traffic shaping configured, you must shutdown the ATM main interface, make your configurations changes, then bring up the ATM main interface.

Important Notes

The following sections contain important notes about Cisco IOS Release12.2(2)B7 that can apply to the Cisco 6400 aggregator.

Session and Tunnel Scalability

Table 4 shows the number of sessions and tunnels supported for the NRP modules in Cisco IOS Release 12.2(2)B7. While using NRP-SSG, Cisco IOS Release 12.2(2)B7 supports the number of sessions and tunnels shown in Table 5.

Note To support more than 750 sessions, the NRP-1 must have 128 MB DRAM.

Note In most NRP-2 configurations, 256 MB DRAM is adequate for up to 6500 (PPPoE) sessions. More sessions require 512 MB DRAM.

NRP-2SV Scalability Tuning Parameters

Following are scalability tuning parameter values used during testing for 8000 PPPoA sessions and 2000 L2TP tunnels. These parameters prevent known issue CSCdu86416 from occurring.

interface Virtual-Template1

keepalive 200

ppp timeout retry 25

ppp timeout authentication 20

vpdn-group 1

l2tp tunnel hello 150

l2tp tunnel receive-window 500

l2tp tunnel nosession-timeout 20

l2tp tunnel retransmit retries 12

l2tp tunnel retransmit timeout min 4

l2tp tunnel retransmit timeout max 6

Following is the hold-queue CLI used during testing.

interface ATM0/0/0

no ip address

load-interval 30

atm vc-per-vp 2048

no atm ilmi-keepalive

hold-queue 4096 in

hold-queue 4096 out

end

Tip With PPPoA over L2TP network architecture, a few PPP sessions may not have IP addresses allocated during system reboot or interface flapping. If you encounter this problem, configure ppp ncp timeout in the template on LNS as shown here:

interface Virtual-Template1ppp timeout ncp 60

It is important to note a potential negative impact on PPPoX termination scenarios:

The default is no time-out at all. Configuringppp timeout ncp 60tells the router if NCP cannot be established within 60 seconds to tear down LCP and start all over again.

Note that you should only configure ppp timeout ncp 60 if you encounter the IP address allocation problem described here. Do not configure the timeout indiscriminately or to any local termination PPPoA/PPPoE deployment.

Note In most NRP-2 configurations, 256 MB DRAM is adequate for up to 6500 (PPPoE) sessions. More sessions require 512 MB DRAM.

Note The default threshold at which Cisco IOS declares a process to have run "too long" is too short for some Cisco IOS processes, when very large numbers of sessions are established on the NRP-2. Use the command scheduler max-task-time 20000 to increase the default threshold. This will avoid unnecessary "CPUHOG" messages.

NRP-1 Scalability Tuning Parameters

This section describes the scalability tuning parameters that should be used for running large numbers of sessions on the NRP-1.

interface ATM0/0/0

hold-queue 1000 in

hold-queue 1000 out

!

interface Virtual-Template1

keepalive 120

ppp max-configure 255

ppp timeout retry 15

ppp timeout authentication 15

DHCP Option 82 Support for Routed Bridge Encapsulation

Service providers are increasingly using ATM RBE to configure DSL access. The DHCP Option 82 Support for RBE feature enables those service providers to use DHCP to assign IP addresses and DHCP Option 82 to implement IP address assignment policies such as limiting the number of IP addresses on specific ports on specific ports or ATM VCs.

The DHCP Relay Agent Information Option enables a DHCP relay agent to insert information about itself when forwarding client-originated DHCP packets to a DHCP server. The DHCP server can use this information to implement IP address or other parameter-assignment policies.

The DHCP Option 82 Support for RBE feature uses a suboption of the DHCP Relay Agent Information Option called Agent Remote ID. The Agent Remote ID suboption enables the DHCP relay agent to report the ATM RBE subinterface port information to the DHCP server when a DHCP IP address request is processed through the ATM RBE subinterface. The DHCP server can use the ATM RBE subinterface information for making IP address assignments and security policy decisions.

Caveat numbers and brief descriptions are listed in the tables in this section. For details about a particular caveat, go to the Bug Navigator located at http://www.cisco.com/support/bugtools/. To access this location, you must have an account on Cisco.com. For information about how to obtain an account, go to the "Feature Navigator" section.

Open Caveats—Release 12.2(2)B7

All of the caveats listed in Table 6 are open in Cisco IOS Release 12.2(2)B7 for the Cisco 6400 NRP-1, NRP-2, NRP-2SV, and NSP. This table lists only severity 1 and 2 caveats and select severity 3 caveats.

Table 6 Open Caveats for Cisco 6400 NRP and NSP for Release12.2(2)B7

Product

Caveat ID Number

Title

Description

Workaround

NRP-2, NRP-2SV, NRP-1, and NSP

CSCdx53637

High CPU utilization for PPPoA sessions recovery when modify shaper

When a traffic shaper value is assigned to a vc-class, or a traffic shaper value is modified, all of the virtual access interfaces belonging to the particular vc-class are reset. It takes approximately 20 minutes to recover 2000 PPPoA sessions.

Perform traffic shaper modifications during maintenance windows in the production network to avoid delay.

NRP-2

CSCdz32636

sub i/f flap causes traceback messages

Traceback messages happen when you flap a sub interface associated with some sessions.

None.

Closed and Resolved Caveats—Release 12.2(2)B7

All of the caveats listed in Table 7 are closed or resolved in Cisco IOS Release 12.2(2)B7 for the Cisco 6400 NRP-1, NRP-2, NRP-2SV, and the NSP. This table lists only severity 1 and 2 caveats and select severity 3 caveats.

PE of MPLS-VPN stops forwarding packets after stress with large packet sizes.

CSCdw37282

Traffic does not pass when reset occurs with traffic shaping enabled.

Open Caveats—Release 12.2(2)B2

All of the caveats listed in Table 14 are open in Cisco IOS Release 12.2(2)B2 for the Cisco 6400 NRP-1, NRP-2, and NRP-2SV. All of the caveats listed in Table 15 are open in Cisco IOS Release 12.2(2)B2 for the Cisco 6400 NSP. These tables list only severity 1 and 2 caveats and select severity 3 caveats. Table 16 lists caveats that pertain to MIB files for the Cisco 6400 aggregator for Release 12.2(2)B2.

Table 14 Open Caveats for Cisco 6400 NRP for Release12.2(2)B2

Product

Caveat ID Number

Description

NRP-2

CSCdr95295

NRP-2: Total memory size displayed is incorrect.

CSCdt57785

NRP-2: You cannot view startup config context if config is set to 0x**4*.

CSCdu58024

NRP-2: GE<->GE back to back with no autonegotiation and user is unable to recover link.

NRP-2 stops responding at se64_close_rx_vc_desc if you try to change vc encap.

CSCdv56280

GE: Auto-nego CLI command is missing.

CSCdv70703

NRP-2: After removing the multicast boundary mroute table not updated.

CSCdv75114

NRP-2: ISIS routing updates not sent with AAL5NLPID, SNAP, MUX in GE-ATM.

CSCdv77023

NRP-2: Multicast client does not respond to ICMP packet with CEF ON.

CSCdw07107

When NSP has large run-conf, there is a loss of IP/SNMP connectivity to NRP-2.

NRP-1

CSCdp05523

NAT: Large address range and portlist chains cause CPU spikes.

CSCdp59354

Egress traffic to RBE ints process sw with FE+ISL and <<bridge irb>>.

CSCdr04534

PPPoA/L2TP: 2000 sessions. Some connected routes are not established after flap.

CSCdr50376

Some sessions drop when the VCs are oversubscribed.

CSCdr82324

L2TP: VPDN: Releases idb for LAC/LNS tunnel.

CSCdt74755

NAT cause high CPU utilization.

CSCdu01557

NRP fails with BADFREEMAGIC message.

CSCdu09764

c6400: NRP crash with bad magic on allocated block.

CSCdu56256

Fast Ethernet interface reports %AMDP2_FE-3-UNDERFLO, transmit error.

CSCdu64354

Option 82 and RADIUS VPI/VCI authentication does not work with S-PVC.

CSCdv19996

FE interface on some NRP-1 boards drops packets.

CSCdv63811

Memory corruption in I/O pool.

CSCdv74851

NRP-1 with IRB fails with bus error.

CSCdv75177

NRP-1-PPPoA—Poor traffic performances caused by ATM0/0/0 drops.

CSCdv82697

NRP-1: IRB Routing protocol updates not working with ISIS.

SSG

CSCdv05136

SSG Service Profile Name should be legally formatted.

Table 15 Open Caveats for Cisco 6400 NSP for Release12.2(2)B2

Product

Caveat ID Number

Description

NSP

CSCdr71571

Disk access error after NRP2 fails with config file open.

CSCdt33730

Port scans caused ALIGN-3-READEXCEPTION on NSP.

CSCdt39132

Unable to synchronize files and directories if the path+filename is more than 53 characters.

CSCdt41423

Secondary stops responding when transitioning to primary on failover.

CSCdu23253

ATM i/f with NRP is not properly displaying alarm state.

CSCdv35547

%SCHED-3-THRASHING error with traceback on NSP.

Table 16 Open Caveats for Cisco 6400 MIBs for Release12.2(2)B2

Caveat ID Number

Description

CSCdv82930

Threshold value for cPppoeVcSessionThresholdTrap not defaulting.

CSCdv83898

atmIntfCurrentlyOAMFailingPVcls.1 causing SNMP-3-CPUHOG.

CSCdv83902

SNMP timeouts walking ciscoPppoeMIB.

CSCdv86358

System reset when activate CISCO-FTP-CLINET-MIB cfcRequestTable row.

Closed and Resolved Caveats—Release 12.2(2)B2

All of the caveats listed in Table 17 are closed or resolved in Cisco IOS Release 12.2(2)B2 for the Cisco 6400 NRP-1 and NRP-2. All of the caveats listed in Table 18 are closed or resolved in Cisco IOS Release 12.2(2)B2 for the Cisco 6400 NSP. These tables list only severity 1 and 2 caveats and select severity 3 caveats.

As a supplement to the caveats listed in the "Software Caveats" section in these release notes, see Caveats for Cisco IOS Release 12.2and Caveats for Cisco IOS Release 12.2T, which contain caveats applicable to all platforms for all maintenance releases of Release 12.2.

Feature Navigator

Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a particular set of features and which features are supported in a particular Cisco IOS image.

Feature Navigator is available 24 hours a day, 7 days a week. To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, e-mail the Contact Database Administration group at cdbadmin@cisco.com. If you do not have an account on Cisco.com, go to http://www.cisco.com/register and follow the directions to establish an account.

To use Feature Navigator, you must have a JavaScript-enabled web browser such as Netscape 3.0 or later, or Internet Explorer 4.0 or later. Internet Explorer 4.0 always has JavaScript enabled. To enable JavaScript for Netscape 3.x or Netscape 4.x, follow the instructions provided with the web browser. For JavaScript support and enabling instructions for other browsers, check with the browser vendor.

Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. It contains feature information about mainline-, T-, S-, and P-trains. You can access Feature Navigator at the following URL:

Documentation CD-ROM

Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unitor through an annual subscription.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sample configurations from online tools by usingthe Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information,networking solutions, services, programs, and resources at any time, from anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you with these tasks:

Technical Assistance Center

The Cisco Technical Assistance Center (TAC) is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two levels of support are available: the Cisco TAC Web Site and the Cisco TAC Escalation Center.

Cisco TAC inquiries are categorized according to the urgency of the issue:

•Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects of business operations. No workaround is available.

•Priority level 1 (P1)—Your production network is down, and a critical impact to business operations will occur if service is not restored quickly. No workaround is available.

The Cisco TAC resource that you choose is based on the priority of the problem and the conditions of service contracts, when applicable.

Cisco TAC Web Site

You can use the Cisco TAC Web Site to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to this URL:

All customers, partners, and resellers who have a valid Cisco service contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to this URL to register:

Before calling, check with your network operationscenter to determine the level of Cisco support services to which your company is entitled: for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). When you call the center, have available your service agreement number and your product serial number available.